Non-detachable buckle structure for plastic part connection

Abstract

The utility model relates to a non-detachable buckle structure for plastic part connection, which comprises a first device and a second device, a limiting plate is arranged on the mounting surface of the first device, an avoiding channel is arranged on the limiting plate, and a plate body of the limiting plate is an elastic plastic part. A buckle is fixed to the installation end of the second device, and the end of the buckle penetrates through the receding channel and then is blocked by the outer side of the limiting plate and cannot return. And when the end part of the buckle passes through the avoiding channel, the limiting plate is forced to generate elastic deformation so as to pass through the avoiding channel. By means of the scheme, the assembling process is simple, assembling of two or more parts can be completed only through a simple inserting action, the assembling time can be greatly shortened, the production and assembling cost is saved, and meanwhile the product strength can be improved through the non-detachable buckle structure.

Description

Technical Field

[0001] This utility model relates to the field of device connection technology, and in particular to a non-detachable snap-fit ​​structure for connecting plastic parts. Background Technology

[0002] With social development and industrial progress, industry competition is becoming increasingly fierce, and products are updated and iterated very quickly. Many low-end products rely on low profit margins and high sales volume to make a profit. If they break, they are directly replaced by customers, which saves after-sales costs. Therefore, when designing products, there is no need to consider disassembly and repair. To control costs, they are designed as disposable products that can only be disassembled by breaking parts.

[0003] If the product operates under harsh conditions and requires high levels of protection, existing technologies using adhesive bonding offer lower structural requirements. However, achieving standardized production is challenging. Adhesive requires curing, and some adhesives have unpleasant odors that can harm personnel and soil work surfaces. Furthermore, adhesive bonding is inconvenient for operators, requires extensive coating, and involves a large fixing area. Therefore, this bonding method should be avoided as much as possible to save time and control costs. Utility Model Content

[0004] The purpose of this utility model is to provide a non-detachable snap-fit ​​structure for connecting plastic parts, so as to solve the problems encountered in the above-mentioned background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A non-removable snap-fit ​​structure for connecting plastic parts includes a first component and a second component. The first component has a limiting plate on its mounting surface, with a clearance channel on the limiting plate. The limiting plate is made of an elastic plastic part. The second component has a snap-fit ​​fixed to its mounting end. The end of the snap-fit ​​passes through the clearance channel and is blocked by the outer side of the limiting plate, preventing it from retracting. Furthermore, when the end of the snap-fit ​​passes through the clearance channel, it forces the limiting plate to undergo elastic deformation, thus allowing it to pass through the clearance channel.

[0007] In the above solution, the end of the buckle is provided with a hook portion. After passing through the clearance channel, the inner end face of the hook portion contacts the outer side of the limiting plate. The front end of the hook portion is provided with a guide slope, the slope of which is 10-30 degrees. As a preferred solution, there is an angle between the inner side of the hook portion and the plate body of the buckle. When the hook portion passes through the clearance channel, it forces the angle to shrink, so that after passing through, the angle returns to prevent the hook portion from retracting, forming a non-removable buckle structure.

[0008] In the above scheme, the inner end face of the hook is perpendicular to the plate of the buckle. The remaining height of the clearance channel after the buckle passes through is less than the height of the inner end face of the hook. After passing through, it can be formed that cannot be retracted, thus achieving the purpose of being non-removable.

[0009] Compared with existing technologies, the beneficial effects of this utility model are as follows: This solution addresses the problems existing in the prior art from the perspectives of cost, product strength, and production operation. It directly incorporates a snap-fit ​​structure into the product itself, eliminating the need for other locking accessories. The assembly process is simple; a single insertion action is sufficient to assemble two or more parts, significantly reducing assembly time and saving production assembly costs. Simultaneously, the snap-fit ​​structure increases product strength, utilizing the elasticity of the plastic parts and the deformation of the snap-fit ​​structure to achieve a non-removable and stable installation of the two components. Attached Figure Description

[0010] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of a half-section of the present invention;

[0013] Figure 3 This is a schematic diagram of the structure of device two in another embodiment of the present invention.

[0014] The diagram is labeled as follows: 1-Component 1; 11-Limiting plate; 12-Avoidance channel; 2-Component 2; 21-Snap fastener; 22-Hook part; 23-Sloping surface. Detailed Implementation

[0015] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0016] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] Example 1, such as Figure 1 and Figure 2 As shown, a non-detachable snap-fit ​​structure for connecting plastic parts includes component 1 and component 2. Both component 1 and component 2 are plastic products, mainly used for the outer shell of electronic products, and can be plastic products. For example, if component 1 is the upper shell, then component 2 is the lower shell; if component 1 is the box body, then component 2 is the box cover. Therefore, component 1 and component 2 are used in conjunction with each other.

[0019] A limiting plate 11 is provided on the mounting surface of component 1, and a clearance channel 12 is provided on the limiting plate 11. The plate body of the limiting plate 11 is a flexible plastic part. In implementation, the limiting plate 11 has an inverted U-shaped structure, and the U-shaped groove is the position of the clearance channel 12. A mounting groove can be provided on the mounting surface of component 1 to facilitate the insertion of the mounting end of component 2 into the interior, providing good sealing and waterproof and dustproof functions.

[0020] The mounting end of component 2 is fixed with a buckle 21. After the end of the buckle 21 passes through the clearance channel 12, it is blocked by the outside of the limiting plate 11 and cannot retract, thus forming a non-removable structure. When the end of the buckle 21 passes through the clearance channel 12, it forces the limiting plate 11 to undergo elastic deformation, which helps the buckle 21 to pass through the clearance channel 12. The elastic deformation of the limiting plate 11 helps the buckle 21 to pass through and also hinders the buckle 21 after it passes through, preventing it from retracting.

[0021] Specifically, the end of the buckle 21 is provided with a hook part 22. After passing through the avoidance channel 12, the inner end face of the hook part 22 contacts the outer side of the limiting plate 11, thereby preventing the hook part 22 from retracting. The front end of the hook part 22 is provided with a guide slope 23. The slope of the slope 23 is 10-30 degrees, so as to force the limiting plate 11 to undergo elastic deformation when passing through the avoidance channel 12.

[0022] The inner end face of the hook 22 is perpendicular to the plate of the buckle 21. This structure is different from the current buckle structure. The current buckle structure uses a triangular hook 22 for easy disassembly, which can open the two devices when subjected to pulling force. However, in this solution, the two devices cannot be opened after installation.

[0023] If the inner end face of the hook part 22 is the fastening amount a, with a value range of 0.5 - 1 mm, if it is too small, the fastening amount is insufficient, and if it is too large, assembly is difficult. The height dimension of the avoidance channel 12 minus the plate thickness of the buckle 21 is b, which is the deformable space of the buckle. Only when b < a can the disconnection of the components be prevented. Therefore, the remaining height dimension in the avoidance channel 12 after being penetrated by the buckle 21 is smaller than the height dimension of the inner end face of the hook part 22. The core of designing a non-detachable buckle is to limit the deformable space of the buckle to be smaller than the fastening amount.

[0024] Embodiment 2 is based on the solution of Embodiment 1. Please refer to Figure 3 , there is an included angle between the inner side of the hook part 22 and the plate body of the buckle 21. When the hook part 22 penetrates the avoidance channel 12, it forces the included angle to shrink, so as to more easily penetrate the avoidance channel 12. At this time, when penetrating the avoidance channel 12, the amount of elastic deformation forced on the limiting plate 11 should be smaller than the amount of deformation caused in Embodiment 1. Because during the penetration process, not only does the plate body of the limiting plate 11 deform, but the hook part 22 also deforms towards the included angle due to the existence of the included angle. Moreover, after passing through the avoidance channel 12, the hook part 22 returns to its original position, and after the included angle returns, the end face of the hook part 22 contacts the outer side of the limiting plate 11, and during the return, it is blocked by the plate body of the limiting plate 11, thus forming a non-detachable structure.

[0025] The buckle structure mainly utilizes the elastic characteristics of the plastic part itself and the deformation on the buckle structure to achieve non-disassembly. During design, select a suitable plastic material, leave a suitable deformation space at the buckle position, and ensure sufficient fastening amount. The buckle structure styles at different parts are different and the functions are also different.

[0026] This solution considers from aspects of cost, product strength, and production operation to improve the problems existing in the prior art. The buckle structure is directly made on the product itself without other locking accessories such as screws and nuts, saving costs. The assembly process is simple, and only a simple insertion action can complete the assembly of two or more parts, which can greatly reduce the assembly time and save the cost of production assembly. At the same time, the buckle structure can increase the product strength, and the buckle connection is also one of the connection methods that can maintain the integrity of the product appearance well, and is applicable to the field of consumer electronic products with high requirements for appearance.

[0027] The biggest feature of this buckle connection structure is its convenient installation, ability to maintain the integrity of the product appearance, and cost savings. The buckle structure is applicable to most industries, such as the small home appliance industry, consumer electronics industry, connection of product shell parts such as children's toys, mobile phones, and intelligent equipment.

[0028] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A non-detachable snap-fit ​​structure for connecting plastic parts, characterized in that: The device includes a first device (1) and a second device (2). The first device (1) has a limiting plate (11) on its mounting surface and a clearance channel (12) on the limiting plate (11). The plate body of the limiting plate (11) is a plastic part with elasticity. The second device (2) has a buckle (21) fixed at its mounting end. After the end of the buckle (21) passes through the clearance channel (12), it is blocked by the outside of the limiting plate (11) and cannot be retracted. When the end of the buckle (21) passes through the clearance channel (12), it forces the limiting plate (11) to undergo elastic deformation, which is used to realize the passage through the clearance channel (12).

2. The non-detachable snap-fit ​​structure for connecting plastic parts according to claim 1, characterized in that: The buckle (21) has a hook (22) at its end. After passing through the avoidance channel (12), the inner end face of the hook (22) contacts the outer side of the limiting plate (11).

3. The non-removable snap-fit ​​structure for connecting plastic parts according to claim 2, characterized in that: The front end of the hook (22) is provided with a ramp (23) for guidance, and the ramp (23) has an inclination of 10-30 degrees.

4. The non-detachable snap-fit ​​structure for connecting plastic parts according to claim 2, characterized in that: The inner end face of the hook (22) is perpendicular to the plate of the buckle (21).

5. The non-removable snap-fit ​​structure for connecting plastic parts according to claim 2, characterized in that: The remaining height of the clearance channel (12) after being passed through by the buckle (21) is less than the height of the inner end face of the hook (22).

6. The non-removable snap-fit ​​structure for connecting plastic parts according to claim 3, characterized in that: An angle is provided between the inner side of the hook (22) and the plate of the buckle (21), and the hook (22) forces the angle to shrink when it passes through the avoidance channel (12).

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